Genuine OEM Audi Fuel Filler Cap with Tether, part number 4E0201550B. This cap is designed to securely seal the fuel tank filler neck, preventing fuel evaporation, spillage, and contamination from dirt or debris. It includes an integrated tether to prevent misplacement or loss during refueling. Weighing 0.098 kg, this cap provides a precise fit and reliable seal. Using a genuine OEM fuel filler cap ensures correct sealing pressure, material compatibility with fuel, and proper tether attachment for safety and convenience.